Management of empyema: a comprehensive review
Eiichi Kanai, Noriyuki Matsutani
Abstract
Abstract: Empyema is a state of purulent pleural effusion in the thoracic cavity. The principle of treatment is the administration of appropriate antibiotics and thoracic drainage. If thoracic drainage is insufficient, thoracic surgeons may perform surgical intervention. It is important that our readers, thoracic surgeons, understand the pathogenesis of empyema and know how to treat it. Medline was used to search for English literature related to “empyema” and “pleural infection”. Searches were limited to the years 2010–2020 and limited to human studies. There have been numerous reports on empyema over the last decade. Regarding guidelines, the British Thoracic Society issued guidelines for pleural disease in 2010. Regarding intrapleural fibrinolytic therapy, the results of Multicenter Intrapleural Sepsis Trial (MIST)—two were reported in 2011 following MIST-1 in 2005, demonstrating the usefulness of intrapleural fibrinolytic therapy. Subsequently, a RAPID (renal, age, purulence, infection source, and dietary factors) risk category was proposed in 2014 as a prognostic factor for pleural infection using MIST-1 and MIST-2 data. Regarding surgery, prospective comparative studies are scarce, but as retrospective reports, the frequency and prognosis of postoperative empyema following lung cancer surgery were reported in 2018. In open window thoracostomy, attention has been paid to using a vacuum-associated closure device to accelerate recovery. There have been numerous reports on empyema and significant progress has been made in the last decade. Further large-scale clinical studies need to be performed to improve the prognosis for empyema.